Method and apparatus for transmitting and receiving HARQ response in communication system

An operation method of a base station in a communication system, the operation method comprising:

• transmitting, to a first terminal, configuration information including a first information element indicating a type of a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook;
• transmitting, to the first terminal, at least one downlink (DL) data through a downlink channel;
• and
• receiving, from the first terminal, the HARQ-ACK codebook including at least one DL HARQ information bit for the at least one DL data and at least one sidelink (SL) HARQ information bit for sidelink communication between the first terminal and a second terminal through an uplink channel,
• wherein the HARQ-ACK codebook received from the first terminal has the type indicated by the first information element, and the type is classified into a semi-static type and a dynamic type.

A first terminal in a communication system, the first terminal comprising:

• a processor;
• and
• a memory storing at least one instruction executed by the processor,
• wherein when executed by the processor, the at least one instruction causes the first terminal to:
• receive, from a base station, configuration information including a first information element indicating a type of a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook;
• generate the HARQ-ACK codebook including at least one downlink (DL) HARQ information bit for downlink communication between the base station and the first terminal and at least one sidelink (SL) HARQ information bit for sidelink communication between the first terminal and a second terminal;
• and
• transmit, to the base station, the HARQ-ACK codebook using an uplink channel,
• wherein the HARQ-ACK codebook transmitted to the base station has the type indicated by the first information element, and the type is classified into a semi-static type and a dynamic type.